lang/gnatdroid-*: Update sysroot to Android API level 9 -> level 19
This is the first of two steps to update the gnatdroid ARM cross-
compilers. The sysroot was 10 versions behind the current API level
of 19. The latest API level drops ARMv5 support, but the API is
backwards compatible, so if applications restrict themselves to
level 18 features, then ARMv5 should still be usable.
The next step is to base the cross compilers on GCC 4.9 instead of the
GCC 4.7-based gcc47-aux port.

lang/gnatdroid-armv(5,7): Use lang/gcc-aux as base, not lang/gnat-aux
After a few additional patches for gcc-aux, gnatdroid-armv5 (and -armv7)
build and execute well when built and based on gcc 4.7-based gcc-aux.
The previous version was based on gcc 4.6-based gnat-aux. This was the
final port requiring gnat-aux, and now its part of the Ada framework.
Running acats using an ASUS Transformer XF101 (Android 4.0.3) as a target
results in a nearly perfect result. Only test cb1010a fails, which is
a failure to detect running out of stack space (-fstack-check). I intend
to investigate further, but as the only problem, gnatdroid remains a
highly capable compiler despite the small regression. Potentially
zero-cost exceptions were gained as a trade-off.

The gnatdroid-armv5 port builds a C/Ada cross-compiler based on GCC 4.6 that
targets the Android operating system (version 2.3, API level 9) running on
ARM architecture (version 5). This produces binaries that run natively on
Android devices as well as the Android SDK emulator.
WWW: http://www.dragonlace.net
PR: ports/160426
Submitted by: John Marino <freebsdml@marino.st>